﻿fn variables() {
	let x = (1, 1.1, "ss");
	println!("before x is {}, {}, {}", x.0, x.1, x.2);

	// let arr = [ 20, 10, 30 ];
	let arr = ( 1..4 );
	for num in arr.rev() {
		println!("num is {}", num);
	}
}
